CVE-2023-25113Public exploitNetwork attack vector

Authenticated code execution via unbounded L2TP key formatting

Published Jul 6, 2023 · Updated Nov 4, 2025

Stack-based buffer overflow in Milesight UR32L 32.3.0.5 allows remote authenticated users to execute arbitrary code via an HTTP request. vpn_l2tp_handler_set passes the HTTP JSON key value to set_l2tp, which uses unbounded sprintf to place it in the fixed vtysh_command_buffer. High-privileged router access is required; an oversized key can crash vtysh_ubus, while successful stack control enables code execution.

CVSS severity7.2
High
EPSS probability1.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Milesight UR32L 32.3.0.5 allows remote authenticated users to execute arbitrary code via an HTTP request. vpn_l2tp_handler_set passes the HTTP JSON key value to set_l2tp, which uses unbounded sprintf to place it in the fixed vtysh_command_buffer. High-privileged router access is required; an oversized key can crash vtysh_ubus, while successful stack control enables code execution.

The record

CVE
CVE-2023-25113
Published
Jul 6, 2023
Updated
Nov 4, 2025
Vendor
Milesight
Product
UR32L
Classifications
CWE-121, T1210
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=v32.3.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Milesight · UR32Lversion=v32.3.0.5

Published CVSS scores

7.2Cisco TalosCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1210Exploitation of Remote Services

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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